build: Fix easy-setup unittests

build: Fix easy-setup unittests

Need to add a parameter to enable valgrind check

Without this change, a race condition may occur and complain like:
service/easy-setup/enrollee/unittests/easysetup_enrollee_test: not found

Bug: https://jira.iotivity.org/browse/IOT-1526
Change-Id: If927c9a2f6e00b18ab92664f014f4f85f34209aa
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14957
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
(cherry picked from commit 47f52b3977fd9c78f549abc0683e8fadc840cac0)
Reviewed-on: https://gerrit.iotivity.org/gerrit/15219
Reviewed-by: George Nash <george.nash@intel.com>